This quantitative study conducted among the IT employees of Kerala is aimed to find out the perception of factors causing gender pay gap. We also studied the difference in the perception of male employees and female employees on the existence as well as the factors influencing the gender pay gap.Through questionnaire survey the data was collected and analyzed. We found out that a majority of respondents perceived gender pay gap in their organizations. Our study found out that the male employees perceived Quality of output followed by working for long hours and projecting oneself, While the Female employee’s perceived Gender discrimination, followed by Quality of output and Projecting oneself (Impression Management) as the most important factors that causes Gender pay gap